the lcd touch screen brightness cannot adjustment price

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When you update the Bios version to 1.5.0 on your Dell XPS 15 7590 system, you may not be able to adjust the LCD brightness. Open the Device Manager, you would find that multiple entries under the Monitors(See Figure.1). At that time, you can not increase or decrease the brightness in the following ways:

Try to adjust the brightness from the Display Settings/Windows Mobility Center(See Figure.2). The value can adjust but the display is stuck at a certain brightness, there is no effect if you adjust it to 0 or 100.

The problem with adjusting the screen brightness can occur in both Windows 10 and Windows 11. Typically, users complain that they cannot increase or decrease the screen brightness on a Windows laptop from the Control Panel or with the keyboard functional keys (Fn + F5/F6/F11/F12).

In most cases, the problem with adjusting the brightness in Windows is related to the display or video card drivers (most often the problem occurs on devices with Intel Graphics and AMD Radeon graphics cards). However, there are other reasons as well. Let’s take a look at a few simple ways to fix the problem when you can’t adjust the brightness on a laptop running Windows 10 or 11.

In Windows 10 and 11, you can change the display brightness from the Settings panel. Go to Settings -> System -> Display (you can open this Settings item by running the ms-settings:display or desk.cpl command). Use the Brightness slider to adjust the screen brightness.

On Windows 10 and 11, you can use the quick settings (action center ) to change the screen brightness. Click on any system icon in the taskbar (Wi-Fi, sound, battery, or press Win + A). Adjust the display brightness using the slider.

Most laptops have special function keys labeled